Boiler



May 29 1928.

C. E. OLDACRE BOILER Filed Nov. 19, 1925 2 Sheets-Shegt' l m fi mm w 0F. 6

May 29, 1928.

C. E. OLDACRE BOILER Filed Nov. 19, 1925 2 Sheets-Sheet 2 Patented May29, 1928.

UNITED STATES PATENT OFFICE.

cnnnnns n. onnaonn, on ronon'ro, ONTARIO,CANADA, ASSIGNOR 'ro THE Gumm"HEATER MANUFACTURING COMPANY, INCORPORATED, OF BOBTONJMASSACHU SETI'S,AL CORPORATION OF MASSACHUSETTS.

" nor-nan. I

Application filed novuaber 1a,, 1925.. swarm. 70,035.

It is the 0 ect of the presentinventioxiv to provide improvements inboilersand furnaces oflthe ty e described in Patent-No.

1,326,621, issue 1 to C. a B. Thompson in; which the ,gases are causedto pass from the cooler through the hotter strata of the fuel bed beforebeing permitted to escape 1 through the chimney.

With this object in view, the various-fea tures oftheinventioni havetodo with the adjustment of the furnaceto different kinds of coal andfuel bedsof various dimensions; with arrangements to facilitate a thecleaning of the boiler sections; with an improved adjusting arrangementfor the gratebars, and other improvements, the nature of which will moreclearly. appear from the following detailed description of a preferr'edembodiment a and the appended claims.

The drawings illustrate the invention as applied to the structuredisclosedwin said patent, to G. B. Thompson, only. so much being shownas is necessa fora clear understandingof the invention. Fig. l-lis a,

vertical cross-section of the boiler and fur nacehFig. 2 a frontelevation of the waterfront adjusting mechanism; Fig. 2". details of theadjusting mechanism; Fig. 3 a sectional plan view on lines 33 .of'Fig.1; and Figs. 4 to 6 are various views illustrating the rate-bar lock. Ih

The boiler and furnace parts 11 and; 2 are 'oined together in anysuitable manner, e. g., y means of flanges 3. The boiler part consistsof a desired number of sections '3 and end sections 26 and 27.Preferably, the arrangement of these sections is thesame as described insaid patent .to- Thompson.

These sections are bounded by ribs, such: as

4, which extend around'the sectionsexcept where openings are provided,thus forming theiusual flues for gases between a ja ent sections. In thefront atthe lower side portion of each boiler section, I} provide aplurality of louvres 5 openinginto the furnace part. .These louvres" areinclined towards the fire 6 to preventithe droppin of coal into theboiler sections and still a low free effected through side opening 12.

access of the. heated gases to the fines. ,As indicatedatBfthe toplouvre is closed. WViththis louvre open, thedraft has a tend ency I toshort-circuit therethroughl back to the reen coalbed; 9. Furthermore,with a low uel supply in the furnace, this louvre, if open to draft,would tend to cool the heatin}; surface of the boiler. I

A, fluerib or baflle 10 projects outer rib4 of each boiler section ataint near the top louvre 5. Theend of ha .10

is curved down, preferably below the lowermost louvre. The upper partofthe-baffle 10 extends substantially in a horizontal line soas to providea largeenclosure back of the louvres in whicl1',,by the curved lip ofthe battle, a Whirlpool actionof the gases is caused to take place. Thehorizontal art of haflle10may be cleanedfrom the -si e of the boilerthroughopeningll. 1 The end of bafiie 1.0 is so shaped that no soot willdo posit thereon, but will fall pastit to the bottom'of the flue wherethe cleaning mayfbe he openings 11 and 12 are, of course, covered withremovable iron plateson theside 12 of the boiler (not shown). .1 1 hAbove the 10 a baths 131 projects from the rib 4; Thebafile 13 isupwardly inclined so as to direct the gases of com: bustion in. acurvedpath .towards the flue outlet .14. The even circulation'oftthe gasestowards this point isaidedalso by the sloping contourof the. lower/apartof the flue, which reventsthe formation of vdead pockets.v T eair-chambers 15 and "16 formed between the slopingpart of rib 4 and theouter casing of theboiler 1, serve also to heat insulate the usesflowing through the lower part of the ue. Furthermore, the inclinedsurfaces tendto concentrate the-soot at: the bottom of the flue wherethe cleaning: may

provided lZOyIWhlCh access may be had from thethrough the side of theboilenf The openings 11, 12 and17 serve also aspassageways between theflues for the gases of combustion. The outlet14, which'is large enoughto serve a'number of flues, communicates integral extensions of t e withchimney flue 18 under the control of the usual damper 19 provided in theoutlet collar 20.

The usual connections, including hubs 21 and 22, are provided forpermitting the free internal circulation of steam and water in all theboiler sections which are suitably joined together by means offlan cs23.

The furnace part 2 is enclose within a front wall 24, a top 25, sidewalls 35, and end sections 26 and 27 Fi 2) which are oiler end sections.The customar magazine charge door'28, slicer or clin'er door 29 and ashpit door 30 are provided in the top and front walls,flrespectively. Theend SGCtlODS 26 and 27 extend only to'the grates of the furnace, andbelow that point the ash pit is covered by plates such as 31 in whichair openings such as 32 are provided.

The arrangement of the furnace differs from the one described in saidpatent to Thompson mainly in the adjustin mechanisin of the water front33. e water front acts as the front wall of the furnace magazine. Wateroutlet pipes 34 provided at each side of the upper end of water front 33project through the furnace side walls. The waterfront 33 connectedthrough pipes not shown) with the water space of the boiler 1, thusformin the circulatin connection of the boiler. ater is admitte to thewater front 33 throu h pipe 36 rojectin through an elongate aperture 3in the si e plate 35.

As shown in Fig. 3, if the number of boiler sections 3 is so great thatmore than one water front is required to fill up the front space of thefurnace 2, then a second water front 33" is joined to 33 by means offlanges 70. lVater circulates from between these two waterfronts throughpipes 71.

Thewater front 33 may be rotated around the pivot constituted by outletpipes 34 to vary the adjustment of the furnace magazine for varioustypes of coal. The forked end 3801? an arm 39 and the end of an arm 40are pivotally held together by means of a pin 41 and bear against thewater front 33. A horizontal rod 42, held by means of nuts 43 in the endplates 35, carries two sleeves 44 and 45 on which the ends of arms 39and 40 are pivotally mounted at 46 and 47. The arms 39 and 40 provide arigid support for the water front 33, relieving stress on the waterpipes and, depending on the positioning of sleeves 44 and 45 on rod 42,the water front may be tilted back and forth by means of these arms. Setscrews 48 and 49 projecting through the sleeves serve to maintain thelatter in their desired positions. The screws 48 and 49 are accessiblethrough the clinker door 29.

A plate 50, mounted on the water front 33,"extends to the top 25 of the.furnace.

The length of this plate is somewhat less than that of the furnace orwater front. Owing to this arrangement air may freely circulate from theopenings 32 through the grates 51, and then directly to'the ignitedlayer 6 of coal, and also infront of water compartment 33, on the twosides of plate 50 and down through the green coal 9. The air will thuscarry with it any otherwise unconsumed products of combustion down throuh the most active part of the fire. The p ate 50 serves also to preventcoal from falling within the front part of the furnace.

The grate bars 51 are supported on bosses 52 projecting from the furnacefront 24 and bosses 53 on the boiler sections. The front end of eachgrate bar is opposite an aperture 54 provided in the front plate 24, theapertures being normally covered by discs such as 55pivotally mounted onlate 24 above of the grate 60 of plate 24, projects within slot 57, PEG?ventin the rotation of the grate bar. Since the loc ing means 59 isprovided inside of the front late 24, the grate bars cannot unlocked trou h inadvertence.

When it is esired to shake a grate bar, the disc 55 is pushed to onesideand the end of a handle is inserted through aperture 54. The end ofhandle 61 registers with cavity 58 in the grate bar and carries a lug 62which registers with the slot 57. Therefore, as the handle end is pushedwithin cavity 58, the lug 62 ,will tilt latch 59 upward and out of theslot 57. The grate bar may now be shaken, lug 62 reventing the latch 59from dropping in t e slot 57 (see Figs. 3 and 6). When the handle 61 iswithdrawn, the latch 59 dropin the slot 57 and disc 54 will return toits normal position. I

While the invention is particularly ada ted for use in combination withthe boi er herein disclosed, it will be obvious to those skilled in theart that some or all of its features are applicable also to other typesof boilers and furnaces without departing from the spirit thereof.

What I claim is:

1. In a furnace, a fuel ma zine, a pivotall mounted water front t erein,a bar rigi y supported in said furnace, an arm having oneendengagingsaid water front, a pivotal connection for the other end of saidarm slidably carried by said bar and means for holding said arm againstthe said water front for supporting the same.

2. In a furnace, a fuel magazine, a'water front in said magazine, awater outlet pipe ate bar end. N ormally Ill leading to said .waterfront and constituting a pivotal mounting for said water front, a barrigidly supported in said furnace, two

pivotally interconnected arms at one end and engaging said Water front,pivotal mountings for the other ends of said arms slidably supported onsaid bar and adjustname to this specification, this 14th day ofNovember, 1925.

CHARLES E. OLDAGRE.

